Consin



W. MITCHELL.

CARRIER 800M.

APPLICATION FILED was 13. mm.

BY Mu ATTOR EY 1,314,010. Patented Aug. 26,1919.

STATES PATENT OFFICE.

WILLIAM MITCHELL, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO MITCHELL MANU-FACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WIS-CONSIN.

Application filed June 13, 1918.

To all whom it may concern:

Be it known that I, vvlLLlAM MITCHELL, a citizen of the United States,and resident of Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented new and useful Improvements in Carrier-Booms,of which the following is a description, reference being bad to theaccompanyin drawings, which are a part of this specification.

The invention relates to booms and more particularly to the truss-workfor bracing the boom.

In carrier systems, more Particularly for dairy barns, it is commonpractice to remove the refuse from the barn by means of a carrierrunning on tracks in the barn and moving on a track extending outside ofthe barn which track is carried by a swinging boom, the carriage beingmoved along the track to deposit the refuse at any point along the boomupon the refuse pile below it. Booms for this kind of work have to belight and strong so that they may be readily moved and hold the track inproper alinei'nent and the object of this invention is to provide animproved construction of boom and particularly an improved means forbracing the boom.

The invention further consist in th sevei'al features hereinafter setforth.

In the drawings:

Figure 1 is a side elevation view of the device embodying the invention,parts being broken away;

Fig. 2 is a plan view, part being broken away Fig. 3 is a section takenon the line 3-3 of Fig. 1;

Fig. 4 is a section taken on the line l-1 of Fig. 3.

In the drawings, the numeral 5 designates a support at the top of a barndoor opening, 6 a track which extends into the barn and is connected tothe support 5 by a hanger 7, 8 a hinge block, 9 a boom, 10 a hingeconnect ing the boom to the block 9, 11 a track carried by the boomthrough hangers 12, 13 a hinge track section connecting the track 6 tothe track 11, 14 a carrier mounted on the track 11 and movable on saidtrack and the track 6, 15 guy wires secured to the boom and extendingback or secured to the side of the barn (not shown). From the foregoingCARRIER-BOOM.

Specification of Letters Patent. Patented Aug. 26, 1919.

Serial No. 239,725.

general description it will be understood that the boom is free to swingabout its hinge connection and that the hinge track connecting the barntrack with the boom track permits the carrier to be moved from the barnout onto the boom track in any position of the boom.

The means for bracing the boom consists of side trusses 16, a top truss17 and truss frames 18.

Each truss frame 18 consists of a two part coupling, the parts 19 and 20of which are secured together by bolts 21, and tubular truss members 22and 23 secured in sockets in said coupling. The truss member 22 isvertically disposed and the members 23 are angularly disposed so thatits ends 26 are below the horizontal plane through the boom 9, that isthe angle between the vertical truss member 22 and the member 23 isgreater than a right angle as is also the angle between the members 23.

The top truss 17 consists of a wire cable connected at one end to thefront end of the boom and at its rear end to the hinge mem ber carriedby the boom, and connected to the truss members 22'of the frames 18 ineach instance by a two part coupling 27, the parts of which are clampedto cable and to the member 22 by a bolt 28. An adjustable turnbuckle 29is used for tightening up the top truss cable 17. n

The side trusses 16 each consists of a wire cable connected at theirforward ends to the front end of the boom and at their rear ends to thehinge member carried by the boom. Each truss 16 is connected to each ofthe truss frames 18 by a clip or two part cou pling 30, the parts ofwhich are clamped to the cable and to the side truss member 23 by a bolt31. In each instance an adjustable turnbuckle is used for tightening upthe side truss cables 16.

The tubular truss members 22 and 23 are braced by side flat brace bars33 each connected at their upper ends to the member 22 by the bolt 28and connected at their lower ends to the members 23 by the bolts 31.

WVith the above construction it will be noted that the boom is firmlybraced asthe drawing up of the cables 16 and 17 puts the truss members22 and 23 under compression to thereby resist tensional strains imposedby the loaded carrier upon the boom and furthermore the inclination ofthe members 22 and 23 with respect to each and at angles greater than aright angle prevents buckling and the compression forces acting alongthese frames toward the boom tend to counter-act or balance each otherand I preferably disposed the frame members so that their angularinclination with respect to each other are equal thereby neutralizing orbalancing these forces about the boom.

From the foregoing description it will be noted that the boom is oflight, simple yet strong and durable construction and well adapted toresist the strains imposed upon it by the loaded carrier.

WVhat I claim as my invention is: g

1. In a supporting boom for carriers, the combination of a boom, trussframes connected to the boom, each truss frame com.- prising avertically disposed frame member and approximately equi-angularlydisposed side frame members extending radially from the boom, a tracksuspended below the boom and between the downwardly disposed side framemembers, and truss members connecting the outer portions of the sideframe members to the boom.

2. In a supporting boom for carriers, the combination of a boom, trussframes connected to the boom, each truss frame comprising a verticallydisposed frame member and approximately equi-angularly disposed sideframe members extending radially from the boom to produce a balancedreinforcement for the boom against lateral strain in any direction, atrack suspended below the boom and between the downwardly disposed sideframe members, and truss members connecting the outer portions of theside frame members to the boom.

side frame members extending radially from Y the boom, a track suspendedbelow the boom and, between the downwardly disposed side frame members,and truss members connecting the ends of the side frame members to theends of the boom. I

4. In a supporting boom for carriers, the combination of a boom, trussframes con.- nectedto the boom, each truss frame comprising a verticallydisposed frame member and approximately equi-angularly disposed sideframe members extending radially from the boom, a track suspended belowthe boom and between the downwardly disposedside frame members, a toptruss cable connected to. the ends of the boom and to the verticallydisposed frame members of the truss frame,

and side truss cablesconnected to the ends of the boom and to the sideframe members of the truss frame.

5. In a supporting boom for carriers, the combination of a boom, a boomblock, a hinge connection between the boom and boom block, truss framesconnected to the boom, each truss frame comprising a vertically disposedframe member and approximately equi-angularly disposed side framemembers extending radially from the boom, a truck suspended below theboom and between thedownwardly disposed side frame members, and trussmembers connecting the outer portions of the side frame members to theboom. I

In testimony whereof, Iaffix my signature.

WILLIAM MITCHELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, G.

